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Oral porcelain tooth 3D gel printing preparation method

A ceramic tooth and oral cavity technology, applied in dental preparations, ceramic molding machines, dentistry, etc., can solve the problems of limited replication accuracy, low material utilization rate, high production cost, etc., achieve high material utilization rate, simplify production process, and improve The effect of using the request

Inactive Publication Date: 2016-10-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method has many shortcomings
First, there are errors caused by human factors in the process of reproducing dental impressions, and the reproduction accuracy is limited
Second, the production cost is higher
Third, it is easy to produce waste during cutting, and the material utilization rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Implementation Example 1: Preparation of zirconia ceramic teeth by 3D gel printing

[0016] (1) Acquisition of oral tooth model: scan the patient's oral cavity through medical digital scanning technology to obtain an accurate model of the patient's oral tooth model, and then generate the required 3D gel printing after appropriate processing of the patient's oral tooth model by medical model analysis software 3D digital model file.

[0017] (2) Preparation of zirconia non-toxic ceramic slurry: add 0.4wt% dispersant ammonium polyacrylate to 50 g of deionized water, adjust the pH to 9 with ammonia water, add zirconia ceramic powder with an average particle size of 10 μm, and ball mill for 12 hours After mixing evenly, add 1wt% agarose and heat the slurry to 85°C, keep the temperature at 85°C and stir vigorously for 30min to form a non-toxic zirconia ceramic slurry with a solid phase content of 57vol% and a viscosity of 0.53Pa.s.

[0018] (3) 3D gel printing preparation an...

Embodiment 2

[0019] Implementation example 2: Preparation of alumina ceramic teeth by 3D gel printing

[0020] (1) Acquisition of oral tooth model: scan the patient's oral cavity through medical digital scanning technology to obtain an accurate model of the patient's oral tooth model, and then generate the required 3D gel printing after appropriate processing of the patient's oral tooth model by medical model analysis software 3D digital model file.

[0021] (2) Preparation of alumina ceramic slurry: add 1wt% dispersant ammonium citrate to 50 g of deionized water, adjust the pH to 10 with ammonia water, add alumina ceramic powder with an average particle size of 20 μm, and ball mill for 6 hours to mix evenly Then add 0.7wt% agarose and heat the slurry to 75°C, keep the temperature at 75°C and vigorously stir for 15 minutes to form a non-toxic alumina ceramic slurry with a solid content of 54vol% and a viscosity of 0.52Pa.s.

[0022] (3) 3D gel printing preparation and sintering molding of...

Embodiment 3

[0023] Implementation Example 3: Preparation of 3Y-TZP (3mol% yttrium oxide stabilized tetragonal polycrystalline zirconia) ceramic teeth by 3D gel printing

[0024] (1) Acquisition of oral tooth model: scan the patient's oral cavity through medical digital scanning technology to obtain an accurate model of the patient's oral tooth model, and then generate the three-dimensional digital data required for 3D printing after appropriate processing of the patient's oral tooth model by medical model analysis software model file.

[0025] (2) Preparation of 3Y-TZP ceramic slurry: add 0.8wt% dispersant ammonium polyacrylate to 50g deionized water, adjust the pH with ammonia water to be 9, add 3Y-TZP ceramic powder with an average particle size of 15 μm, and ball mill After 24h, add 2wt% agarose and heat the slurry to 87°C, keep the temperature at 87°C and stir vigorously for 20min to form a 3Y-TZP ceramic slurry with a solid phase content of 60vol% and a viscosity of 0.5Pa.s.

[0026...

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Abstract

The invention provides an oral porcelain tooth 3D gel printing preparation method, and belongs to the technical field of quick forming of precise porcelain composite materials. The oral porcelain tooth 3D gel printing preparation method comprises the following steps: firstly, acquiring an actual three-dimensional virtual model of oral teeth of a patient by using a medical digital scanning technology, processing with medical model analyzing and processing software, and then generating a formatted file required by 3D printing; secondly, preparing required non-toxic biomedical porcelain slurry, controlling a 3D printer to extrude the slurry along a sprayer with a specific size through computer 3D printing software, and then stacking layer by layer to form a three-dimensional blank body of the oral porcelain teeth; and finally, after drying the blank body, sintering the blank body at high temperature to obtain the final product. By the method, the oral porcelain teeth can be produced quickly and highly precisely, the material utilization rate is high, the printed porcelain teeth are safe and non-toxic and are good in biological compatibility, and in the aspect of the mechanical property, teeth can be matched well. In addition, by the method, production cost is reduced, a technical process of product is simplified, operability is high, and private customization is easy to implement.

Description

technical field [0001] The invention relates to the latest preparation technology of oral ceramic teeth, and belongs to the technical field of rapid prototyping of precision ceramic composite materials. Specifically, it combines medical digital scanning technology with the 3D gel printing preparation method of non-toxic slurry to prepare oral ceramic teeth. Background technique [0002] Teeth, dentition defects and dentition are common and frequently-occurring diseases of human beings. The World Health Organization announced that oral diseases have been listed as the third largest diseases after cancer and cardiovascular and cerebrovascular diseases. At present, the commonly used medical materials for dental restoration include alloy, ceramic and composite resin materials, among which ceramic materials are the most recognized. First of all, because ceramic materials are thermal insulators, their thermal expansion coefficient is close to that of teeth, and their hardness is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/10B28B1/00A61K6/02B33Y70/00B33Y10/00
CPCA61K6/802A61K6/818A61K6/822B28B1/001B33Y10/00B33Y70/00C04B35/10C04B35/48
Inventor 邵慧萍赵德超林涛任向远张乐戚江聪
Owner UNIV OF SCI & TECH BEIJING
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